WASHINGTON, DC - SEPTEMBER 20:  A park bench sits in the waters of the Washington Channel during a high tide, September 20, 2016 in Washington, DC. Nussiance high tides have become common place in many east coast cities, and are expected to get worse as the warming climate and melting ice sheets are accelerating the threat to the region&#39;s monuments, roads, wildlife refuges.  (Photo by Mark Wilson/Getty Images)